Direkt geheizte Gluehkathode mit einem gewendelten Nickelrohr als Traeger der emittierenden Schicht,申请号DE193701S6549D-传众专利搜索

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发明名称	Direkt geheizte Gluehkathode mit einem gewendelten Nickelrohr als Traeger der emittierenden Schicht
摘要
申请公布号	DE689221(C)	申请公布日期	1940.03.14
申请号	DE193701S6549D	申请日期	1937.03.23
申请人	SIEMENS & HALSKE AKT.-GES.	发明人	KNIEPKAMP DR. HEINRICH
分类号	H01J1/18	主分类号	H01J1/18
代理机构		代理人
主权项
地址

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